Rotor Platform of Aerodynamic Force and Method of Aerodynamic Force Generation

ABSTRACT

Rotor platform of aerodynamic force is meant for generating aerodynamic lift force in horizontal position and aerodynamic transverse force in vertical position, with further practical implementation as a robust power installation of transport vehicle facilities. 
     The principle of operation of the platform is based on the well-known Magnus effect—generation of transverse force acting on an object spinning in the ambient air flow. The basis of the construction is the unit of several coplanar rotors, wherein the rotors spinning is caused by the air flow force and the rotors provide the summed value of the generated aerodynamic to force.

FIELD OF THE INVENTION

A rotor platform of aerodynamic force and a method of aerodynamic forcegeneration relate to wind power engineering and are meant for generatinglift and transverse aerodynamic forces.

BACKGROUND OF THE INVENTION

It is known that aerodynamic force results from the interaction ofphysical objects with the ambient air flow (1, page 484).

An airplane wing is one of the simplest well-known physical objectsgenerating in the ambient air flow an aerodynamic force in the form of alift force (2, page 505).

A wing lift force is produced owing to its unsymmetrical form, with theair flow streaming around it to pass its curved upper surface at thevelocity larger than the velocity of the air flow passing its flatbottom. Due to the difference in the velocities, as per Bernoulliequation, a lift force is produced, which value is derived viaKutta-Joukowski theorem as given below:

${Y = {{\rho \; V\; \Gamma \; L} = {C_{y}\frac{\rho \; V^{2}}{2}S}}},\left( {3,\; {{{cTp}.\mspace{14mu} 141}\text{-}142}} \right)$

-   Γ—velocity circulation value;-   ρ—air density;-   V—windstream velocity;-   S—wing surface square in plain view;-   L—wing length;-   C_(y)—dimensionless coefficient dependant on the physical properties    of air, the wing itself and the wing orientation against the air    flow.

A lift force Y in symbolic expression as cited above, or as follows

A=ρΓVL,

as per (4, page 121) is also termed transverse and its value isproportional to the flow velocity squared and the value of coefficientC_(y) .

“The value C_(y) bears considerable importance as the larger it is thelesser are the take-off speed and landing speed of an airplane”, i.e.the minimum air flow velocity generating the specified lift forcedepends directly on the value C_(y). In a particularly preferredembodiment of the wing, the value C_(y) does not exceed the values 1, 2(3, pages 141-142).

It is known that the cylinder rotating around the longitudinal axis “ .. . under equal conditions creates a force 10 times larger that the wingdoes” (5, pages 55-57), i.e. the coefficient C_(y) gains the valuen-order larger than that of the airplane wing.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic representation of the rotor platform ofaerodynamic force .

FIG. 2 is a section view of the platform rotors.

DESCRIPTION OF THE INVENTION

The proposed invention is aimed at utilizing the potential of generatingaerodynamic force by the cylindrical body rotating in air flow andcreating hereon a simple and efficient technical device capable ofgenerating powerful lift and transverse force suitable for practicalimplementation.

The schematic representation of the rotor platform of aerodynamic forceis presented in FIG. 1. The basis of the construction is the rotor unitof identical symmetrical coplanar central and lateral rotors withload-bearing elements of logarithmic spiral profile, the prototypethereof being a marine rotary wind-powered propulsion—BY No. 8234.

The rotation longitudinal axis 1 of the central rotor 2 is fixed in theplatform frame 3, whereas the longitudinal axes of the lateral rotors 4are rigidly tied by cross-members 5, with the centers of thecross-members via the bearing units coupled with the fixed rotation axisof the central rotor, which allows the firmly inter-tied lateral rotorsto repeatedly take a symmetrical position in a single plane as per thecentral rotor.

It is also known that air flow flowing around the rotating body causescirculation of the air flow around its contour, the velocity thereof issummed up with the velocity of the flow when they are co-directional (4,pages 100-105), which imparts additional kinetic energy to the flow.

The essence of the invention consists in using the flow with additionalvelocity to act on the consecutive rotor.

The method of generating aerodynamic force by the rotor platform,aerodynamic force being a sum of aerodynamic forces generated by eachplatform rotor, is shown in FIG. 2.

The air flow with initial velocity V₁ falls on the first rotor and setsit to rotation at the velocity V_(1 R). Summation of the rotationvelocity and flow velocity results in the flow velocity thatsubstantially exceeds its initial value

V _(1S) =V ₁ +V _(1R).

The flow further falls on the consecutive rotor at the velocity V_(1S),sets it to rotation at the velocity V_(2R), summation of velocitiesresults in the velocity V_(2S) that renders its effect on the consequentrotor, whereby fully repeating the previous cycle.

Thus, the value of aerodynamic force generated by the rotor platformaccording to Kutta-Joukowski theorem is expressed as follows:

${\sum Y} = {C_{y}{\rho\left( {\frac{V_{I}^{2}}{2} + \frac{V_{1\; S}^{2}}{2} + \frac{V_{2S}^{2}}{2}} \right)}{S.}}$

REFERENCES

-   1. The Great Soviet Encyclopedia, 3^(rd) edition., vol. 2.-   2. The Great Soviet Encyclopedia, 3^(rd) edition., vol. 13.-   3. The Great Soviet Encyclopedia, 3^(rd) edition., vol. 20.-   4. Prandtle L., Fluid Mechanics. M., 1951.-   5. Merkoulov V. I. Hydrostatics, Known and Unknown, M., 1989-   6. Patent BY No. 8234.

1. A rotor platform of aerodynamic force comprising identical centraland lateral rotors with load-bearing elements of logarithmic spiralprofile, characterized in that the rotation longitudinal axis of thecentral rotor is fixed in the platform frame, whereas the rotationlongitudinal axes of the lateral rotors are rigidly tied bycross-members, with the centers of the latter ones, via bearing units,being coupled with the fixed longitudinal axis of the central rotor. 2.A method of generating aerodynamic force by the rotor platform accordingto to claim 1, characterized in that the given aerodynamic forcerepresents the sum of the forces generated in the nearest to the rotorair flow, due to the flow with natural velocity, whereas on eachconsequent rotor under the effect of the flow with the summed velocitygenerated on each preceding rotor due to the summation of the rotationvelocity and the flow velocity, being mathematically expressed asfollows:${\sum Y} = {C_{y}{\rho\left( {\frac{V_{I}^{2}}{2} + \frac{V_{1\; S}^{2}}{2} + \frac{V_{2S}^{2}}{2}} \right)}{S.}}$